Crypto tools that just work

Calculate your crypto profit, loss and ROI on any trade — including buy and sell fees — with live prices. Free, instant, no sign-up, runs in your browser.

Backtest dollar-cost averaging into Bitcoin — or Ethereum, Solana and other major coins — and see what regular buys would be worth today.

Estimate staking rewards and effective APY from your amount, APR, duration and compounding frequency.

Project compound growth of your crypto with periodic contributions and any compounding frequency.

Calculate impermanent loss for a 50/50 liquidity pool from each asset’s price change.

Find the liquidation price of a leveraged long or short from entry, leverage and maintenance margin.

Size a trade from your account, risk percent, entry and stop-loss to keep risk under control.

Work out position size and required margin from your collateral and leverage multiplier.

Average down: compute your weighted average entry price and cost basis across multiple buys.

Estimate daily and monthly mining profit from hashrate, network difficulty, power cost and coin price.

Rough capital-gains estimate from your proceeds, cost basis and tax rate. Not tax advice.

Upload a CSV of your trades to compute realized gains, cost basis and holdings — in your browser, nothing uploaded.

Convert mining hashrate between H/s, kH/s, MH/s, GH/s, TH/s, PH/s and EH/s instantly. A fast, free hashrate unit converter that runs in your browser.

Convert between Wei, Gwei and ETH instantly, and estimate any Ethereum gas fee in USD from the gas units and gas price. Free, no sign-up, in your browser.

Convert satoshis (sats) to USD and BTC instantly at any Bitcoin price you set — and back again. Fast, free, no sign-up, runs in your browser.

Generate SHA-256, SHA-512, Keccak-256, RIPEMD-160, MD5 and more from text or hex — in your browser.

Encrypt and decrypt text with AES-256-GCM and a password. Everything stays in your browser.

Check whether a Bitcoin or Ethereum address is valid, with its type, network and checksum.

Convert text between Base64, Hex, Base58, Binary and UTF-8 — encode and decode in your browser.

Generate and validate BIP39 mnemonic seed phrases (12–24 words) and derive the seed — in your browser.

Generate strong, random passwords with a crypto-secure RNG. Length, character sets and entropy — nothing uploaded.

Decode a JSON Web Token (JWT) — inspect its header, payload and claims in your browser. Nothing uploaded.

Derive Bitcoin (legacy & SegWit) and Ethereum addresses from a BIP39 phrase (BIP32/44/84) — watch-only, in your browser.

Generate an RSA key pair (2048/3072/4096-bit) and export it as PEM — in your browser, nothing uploaded.

Sign and verify a message with an ECDSA secp256k1 key (Bitcoin/Ethereum’s curve) — in your browser.

Make a QR code for a Bitcoin or Ethereum address or payment request (BIP21/EIP-681) — in your browser.

Compute the Merkle root and tree of a list of leaves — SHA-256 or Bitcoin double SHA-256, in your browser.

Disassemble Ethereum (EVM) bytecode into opcodes and function selectors — in your browser.

Generate a custom Ethereum vanity address with your chosen prefix — in your browser, keys never leave your device.

Compute the 4-byte function selector and event topic (keccak256) from a Solidity signature — in your browser.

Compute the ENS namehash (EIP-137) and labelhash of any .eth name — in your browser.

Mine a “block” in your browser: pick a difficulty and watch SHA-256 hash until it beats the target.

Compute the EIP-712 domain separator, struct hash and signing digest from typed data — in your browser.

See an elliptic curve over a prime field and the point-addition group law that secures crypto keys.

Split a secret into N shares where any T reconstruct it — in your browser, nothing uploaded.

Decode a raw Ethereum transaction (legacy / EIP-1559) into its fields and recover the sender.